Several similar healthy plants have sprouted all on their own in one of my outside flower pots. Before a seedling grows its first set of true leaves, its hard to say what type of plant it is.
One of my friends declared that they were melons. They sort of look like the cucumbers I have started from seed inside my house.
I am not really sure what they really are but one of the plants still has a seed attached to its leaf. It looks like is might be a sunflower seed. In fact it looks a lot like the seeds I have been feeding to the birds this winter. How they ended up in a flower pot is a mystery.
I have transplanted them into individual pots and am giving them a chance to grow into plants that I will then plant in the yard. If they are sunflowers, then I am hoping to produce a lot of seeds to feed the birds next winter.